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Finding the Fourth Proportional to 1,785.12, 2,463.25 and 988.38

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Solution

The fourth proportional to 1,785.12, 2,463.25 and 988.38 is: 1,363.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.12 : 2,463.25 = 988.38 : x
  2. Step 2: Convert to fraction form
    1,785.12/2,463.25 = 988.38/x
  3. Step 3: Cross multiply
    1,785.12x = 2,463.25 × 988.38
  4. Step 4: Simplify right side
    1,785.12x = 2,434,630.72
  5. Step 5: Solve for x
    x = 2,434,630.72/1,785.12
  6. Step 6: Final answer
    x = 1,363.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.